Since the beginning of the 20th century, one of the concerns of physicists was the knowledge and explanation of fundamental particles. Finally, in the 1970s, the standard model of fundamental particles was compiled and formulated by the greatest physicists of that time. In the standard model, the fundamental particle is unstructured and is not composed of other particles.
We basically think of a particle as a point-like object, said Mary Gaillard, who predicted the masses of two types of quarks in the 1970s. And yet particles have distinct traits, such as charge and mass. How can a dimensionless point bear weight?
Many physicists have thought about the reality of the fundamental particle. Some physicists consider this definition mathematical, which could not convince physicists to give up its physical recognition. And they provided different definitions for it, of which string theory is the most famous. In this video, some new theories about particles are reviewed.